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SubjectRe: [PATCH 1/1] mm: Fix struct page layout on 32-bit systems
On Thu, Apr 15, 2021 at 09:11:56PM +0000, David Laight wrote:
> Isn't it possible to move the field down one long?
> This might require an explicit zero - but this is not a common
> code path - the extra write will be noise.

Then it overlaps page->mapping. See emails passim.

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